Screen before world

made it only work on singleplayer

first version, no updates, so you can say: turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle turtle